Add tests for ::chdir().

Author: costdev

tests/phpunit/tests/filesystem/wpFilesystemDirect/chdir.php

@@ -0,0 +1,96 @@
+<?php
+/**
+ * Tests for the WP_Filesystem_Direct::chdir() method.
+ *
+ * @package WordPress
+ */
+
+require_once __DIR__ . '/base.php';
+
+/**
+ * @group admin
+ * @group filesystem
+ * @group filesystem-direct
+ *
+ * @covers WP_Filesystem_Direct::chdir
+ */
+class Tests_Filesystem_WpFilesystemDirect_Chdir extends WP_Filesystem_Direct_UnitTestCase {
+
+	/**
+	 * Tests that `WP_Filesystem_Direct::chdir()`
+	 * returns false for a path that does not exist.
+	 *
+	 * @ticket 57774
+	 *
+	 * @dataProvider data_should_fail_to_change_directory
+	 *
+	 * @param string $path The path.
+	 */
+	public function test_should_fail_to_change_directory( $path ) {
+		$original_cwd = self::$filesystem->cwd();
+		$path         = wp_normalize_path( realpath( self::$file_structure['test_dir']['path'] ) ) . $path;
+		$chdir_result = self::$filesystem->chdir( $path );
+		$cwd_result   = self::$filesystem->cwd();
+
+		// Reset the current working directory.
+		self::$filesystem->chdir( $original_cwd );
+
+		$this->assertFalse(
+			$chdir_result,
+			'Changing working directory succeeded.'
+		);
+
+		$this->assertSame(
+			$original_cwd,
+			$cwd_result,
+			'The current working directory was changed.'
+		);
+	}
+
+	/**
+	 * Data provider.
+	 *
+	 * @return array[]
+	 */
+	public function data_should_fail_to_change_directory() {
+		return array(
+			'a file that exists'              => array(
+				'path' => 'a_file_that_exists.txt',
+			),
+			'a file that does not exist'      => array(
+				'path' => 'a_file_that_does_not_exist.txt',
+			),
+			'a directory that does not exist' => array(
+				'path' => 'a_directory_that_does_not_exist',
+			),
+		);
+	}
+
+	/**
+	 * Tests that `WP_Filesystem_Direct::chdir()` changes to
+	 * an existing directory.
+	 *
+	 * @ticket 57774
+	 */
+	public function test_should_change_directory() {
+		$original_cwd = self::$filesystem->cwd();
+		$path         = wp_normalize_path( realpath( self::$file_structure['test_dir']['path'] ) );
+		$chdir_result = self::$filesystem->chdir( $path );
+		$cwd_result   = self::$filesystem->cwd();
+
+		// Reset the current working directory.
+		self::$filesystem->chdir( $original_cwd );
+
+		$this->assertTrue(
+			$chdir_result,
+			'Changing working directory failed.'
+		);
+
+		$this->assertSame(
+			$path,
+			$cwd_result,
+			'The current working directory was incorrect.'
+		);
+	}
+
+}